JavaScript Frameworks and Libraries with syntax and examples

JavaScript frameworks and libraries are pre-built code packages that provide a structure and tools to build web applications efficiently. They simplify development, reduce code duplication, and improve maintainability.

Popular JavaScript Frameworks

- React:
    - Component-based architecture
    - Virtual DOM for efficient rendering
    - JSX syntax for templating

Syntax:


import React from 'react';

function HelloComponent() {
    return <div>Hello World!</div>;
}

ReactDOM.render(<HelloComponent />, document.getElementById('root'));


- Angular:
    - Model-View-Controller (MVC) architecture
    - Dependency injection for services
    - Template syntax for binding data

Syntax:


import { Component } from '@angular/core';

@Component({
    selector: 'hello-component',
    template: '<div>Hello World!</div>'
})
export class HelloComponent {}


- Vue.js:
    - Progressive and flexible framework
    - Component-based architecture
    - Template syntax for binding data

Syntax:


<template>
    <div>Hello World!</div>
</template>

<script>
export default {
    name: 'HelloComponent'
}
</script>


Popular JavaScript Libraries

- jQuery:
    - DOM manipulation and traversal
    - Event handling and AJAX requests
    - Cross-browser compatibility

Syntax:


$('#hello').text('Hello World!');


- Lodash:
    - Utility functions for arrays, objects, and strings
    - Functional programming helpers
    - Debouncing and throttling functions

Syntax:


const _ = require('lodash');

const array = [1, 2, 3];
const doubled = _.map(array, (x) => x * 2);


- Axios:
    - Promise-based HTTP client
    - Interceptors for request and response handling
    - JSON data parsing

Syntax:


import axios from 'axios';

axios.get('/api/data')
    .then((response) => console.log(response.data))
    .catch((error) => console.error(error));


By mastering JavaScript frameworks and libraries, developers can build robust, scalable, and maintainable web applications efficiently. Remember to practice and experiment with different examples to solidify your understanding.

Next Topic:

- Module 13: Web Application Security

In this module, we will explore web application security best practices and common vulnerabilities. We will learn how to protect against cross-site scripting (XSS), cross-site request forgery (CSRF), and SQL injection attacks.